live rock question

davidjapw

New Member
I have a 40 gal. tank set up to culture my live rock and until now it has been flourishing ( alot of coraline algae purple and bright green) among other growth.
In the last few days on a few pieces of the rock a deep redish algae has appeared that is growing almost like hair algae, it is spreading at an incredible rate.
Can anyone help me by telling me what it could be and how bad it is.
thanks in advance
 
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